RUKO SPB-DIN338-11/32-HSSCo HSS-Co Twist Drill Bit 11/32 inch (8.73 mm) DIN 338

With a 135° split point and 5% cobalt alloy, this RUKO twist drill bit powers through stainless steel, acid-resistant steel, and heat-resistant alloys up to 1100 N/mm². The ground-from-solid HSS-Co body resists heat and wear, keeping your holes accurate in tough, abrasive materials.

Overview

The RUKO SPB-DIN338-11/32-HSSCo is a precision-ground twist drill bit manufactured to DIN 338 standards. Its 11/32 inch (8.73 mm) diameter and cylindrical straight shank fit standard drill chucks, while the bright finish reduces friction and improves chip flow.

What stands out

• 5% cobalt HSS-Co steel for high heat resistance and durability
• 135° split point for fast, self-centering starts without walking
• Ground from solid for consistent geometry and h8 tolerance
• Right-hand cutting with standard jobber length (125 mm overall, 81 mm flute)
• Suitable for stainless steel, cast iron, non-ferrous metals, and plastics

Technical details

• Material: HSS-Co (5% cobalt)
• Standard: DIN 338
• Diameter: 11/32 inch (8.73 mm)
• Point angle: 135°
• Shank: cylindrical (straight)
• Flute type: right-hand cutting
• Surface finish: bright
• Manufacturing: ground from solid
• Tolerance: h8
• Overall length: 125 mm
• Flute length: 81 mm
• Max material hardness: 1100 N/mm²

Our verdict

A professional-grade cobalt drill bit built for demanding jobs. When standard HSS bits dull or overheat, this RUKO bit keeps cutting cleanly in high-alloy steels and tough materials.